1st of all i tried to post this in the off topic section, but it would not let me.
a portion of what was written here confuses me http://forums.tdiclub.com/showthread.php?t=75062


"Second, an illustration: For argument's sake, take a stock 90HP TDI, and we'll arbitrarily say that it has a 15% driveline loss. That means that the engine would be developing about 104HP (90/1.15) at the crank. The loss through the drivetrain was 14HP (104-90). Now, you do a bunch of engine mods without touching the drivetrain, and you now measure, say, 135HP at the wheels. Adding the customary 15% to refer back to the crank, you get 155HP, but the loss through the drivetrain is now 20HP, a difference of 6HP, WHEN NOTHING HAS BEEN TOUCHED THERE!"

why is he surprised adding 15% to 135 as opposed to the smaller number of 90 is 6hp higher? of course the bigger the number you add a percentage to isnt going to stay the same as the smaller one. maybe im missing something....